Black isn't a color though -- it's the absence of color.
I'm told my best colors are "murky" aka they have some black mixed into them. And yeah I believe that to be true. In fact 98% of the colors in my closet fit that description.
But I push the line often anyway, as I do like a clear & bright color every now and then, like my current favorite coat. Right now I am sporting OPI Big Apple red nails, which is the identical color to that coat. I can see that it's not the ideal color for my skin tone. A burgundy or plum or magenta or blue-based red is much more flattering. But I love the color and it's not horrible so I work it in anyway.
I'm also not supposed to wear autumn colors. I agree these are not the best for me, especially oranges and yellows and beiges. But sometimes I can find just the right blue-based orange or yellow, and it works, if worn with white not beige. And certain shades of autumn green (like an army jacket green) go really well with my eyes so like my Big Apple red coat I work it in anyway.
Cobalt is actually also not supposed to be in my color wheelhouse, as it's a clear color -- winter -- not murky. But a jolt of cobalt is so much fun so I usually have some of this in my closet somewhere too.
I think what I've learned is that it's more about the overall mix of colors and how you contrast them against each other, if that makes sense? If I incorporate some black or some white, I can usually make a color work.
ETA: oh wow, it just occurred to me what I'm doing: I add black to murky-up a clear color, and add white to brighten it up... okay maybe that's obvious to everyone else but that only just clicked for me....d'oh! Then again I took that color test that was going around FB awhile back and it said I did not do the greatest job discerning the subtleties between different shades.